# print("1")
# print("2")
# print("3")

# choice = input("输入1表示认真学习，输入2表示躺平摆烂：")
# if choice == "1":
#     print("你会找到好工作！")
# elif choice == "2":
#     print("你可能毕业就失业了！")
# else:
#     print("你的输入有误！")

# a = input("请输入一个整数: ")
# if a == "1":
#     print("hello")
#     print("world")

# a = input("请输入一个整数: ")
# if a == "1":
#     print("hello")
# print("world")

# a = input("请输入第一个整数：")
# b = input("请输入第二个整数：")
# if a == "1":
#     if b == "2":
#         print("hello")
#     print("world")
# print("python")

# year = int(input("请输入年份："))
# if (year % 100 != 0 and year %4 == 0) or year % 400:
#     print("闰年")
# else:
#     print("平年")

# a = int(input("请输入一个整数："))
# if a % 2 == 0:
#     print("偶数")
# else:
#     print("奇数")

# a = int(input("请输入一个整数："))
# if a > 0:
#     print("正数")
# elif a<0:
#     print("负数")
# else:
#     print("为0")

# a = int(input("请输入一个整数:"))
# if a == 1:
#     print("hello")

# a = int(input("请输入一个整数:"))
# if a != 1:
#     pass
# else:
#     print("hello")

# num = 1
# while num<=10:
#     print(num)
#     num+=1

# sum = 0
# num = 1
# while num <= 100:
#     sum += num
#     num += 1
# print(sum)

# result = 1
# n = 1
# while n <= 5:
#     result *= n
#     n += 1
# print(result)

# sum = 0
# num = 1
# # 分别求1 - 5（num）的阶乘
# while num <= 5:
#     result = 1
#     # 求第num次的阶乘
#     i = 1
#     while i <= num:
#         result *= i
#         i += 1
#     sum += result
#     num += 1
# print(sum)

# for i in range(1,11):
#     print(i)

# for i in range(2,12,2):
#     print(i)

# for i in range(10,0,-1):
#     print(i)

# sum = 0
# for i in range(1,101):
#     sum += i
# print(sum)

# for i in range(1,6):
#     if i == 3:
#         continue
#     print(f"吃完第{i}个包子")

# for i in range(1,6):
#     if i == 3:
#         break
#     print(f"吃完第{i}个包子")

# sum = 0
# count = 0
# while True:
#     num = input("请输入数字：")
#     if num == ';':
#         break
#     num = float(num)
#     sum += num
#     count += 1
# print(sum / count)



